17-year-old kid busted for making booby-trapped pens

The LA Times reports that a 17-year-old boy from Rosemead, CA has fessed up to making booby-trapped pens and leaving them on the ground. When the pens were uncapped, they'd explode. He was apparently upset that he had been expelled from school, and decided to take out his anger on random people.

The books seized by investigators described explosive-making procedures but did not say how to rig a pen to detonate, Miller said. "Coming up with the idea was his doing," he said.

The incidents started at Rosemead High School on Aug. 24 while students were registering for school. A construction worker on campus picked up a pen near a line of students and it exploded in his hands. In September, another small blast occurred when a female resident of Rosemead picked up a pen just outside the school's fence.

A week ago, a student was injured at El Monte High School when he picked up a felt-tip pen in a restroom.

Link (Here's a December 6 story about the exploding pens, before they found the darkside maker)